DIESEL INGENIUM ENGINE WITH LOW PRESSURE AND AN EXHAUST VALVE COOLER BLOCKAGE

Vehicle Types: Land Rover / Jaguars (and any vehicle fitted with the 2.0 diesel ingenium engine.

Model types: Including but not limited to: Range Rover Evoque, Discovery Sport, Land Rover Defender, Range Rover, Range Rover Sport

Vehicle Fault: Vehicle in restricted performance and DTC P049B-00

Fault codes: P049B-00 EGR “B” Flow Insufficient Detected - No sub type information. Other low pressure EGR related DTCs

LOW PRESSURE EGR

The LP EGR system is used on EU5 and EU6 market vehicles only.

The LP system takes exhaust gases from the exit of the Diesel Particulate Filter (DPF) system, and mixes it with the fresh air intake into the turbocharger.

The gases are transported from the DPF outlet to the LP EGR cooler via a pipe. The LP cooler has no bypass mode, so only cools.

There is a simple mesh filter fitted before the gasses reach the outlet of the cooler that prevents larger particles of soot etc. from entering the turbo charger system. The mesh filter is a non-serviceable component.

The cooled gases are then directed through the LP EGR valve, via a butterfly flap.

The valve consists of a tube between the fresh air duct and the turbocharger, with the butterfly valve covering the EGR inlet, in the center bottom of the EGR valve.

The butterfly valve opens into the fresh air stream, promoting both thorough mixing before the gas enters the turbocharger, and also provides ‘suction’ to drive the LP EGR gas through the system.

Possible Causes

• Excessive undetected soot in the DPF

• Charged air induction system leak

• Low pressure EGR cooler blocked / filter blocked

• Low pressure EGR valve mechanical integrity

• Low pressure EGR differential pressure sensor mechanical integrity

• Connector is disconnected, connector pin is backed out, connector pin corrosion

• Vehicle is fitted with TWO EGR valves a LP and HP unit. One is DPF side to turbo the other is exhaust manifold to intake manifold.

Repair

1. Using a HP smoke detector visually inspect the air intake system for leaks. And repair any that are found.

2. If there are no signs of soot particles this is not the cause of the customers concern.

3. Remove low pressure EGR cooler housing lid and visually inspect for soot particles.

4. Is the cooler blocked, See #NOTE# blocked LP EGR cooler filter image below. We have seen the filters internally block as per the image below, this would require a new filter set LR126126 cleaning of the EGR/Throttle body and the Low pressure EGR cooler.

5. Low pressure EGR pipe on the nearside is it blocked.

6. Look for signs of sooting around the clamp.

7. Black soot around the tail pipe.

8. Loosen the SCR assembly, look up into the cooler and check for excessive levels of soot.

9. DPF/SCR canister cracked internally.

10. JLR process change LP EGR and cooler.

11. Change cooler pressure sensor and SCR/DPF unit.

12. Pressure sensor is bolted to the intake side of the engine looks like a DPF pressure sensor one goes to the cooler pack and the longer pipe goes to cooling unit this measures the pressure either side of the unit.

13. If the cooler also shows signs of being excessively blocked, then the cooler may need replacing as well.

14. The DPF may also need inspecting for cracks that can draw in air from the outside causing excessive sooting.

15. After the repair, reconfigure existing PCM with latest software with a dealer tool.

16. Once completed check below:

17. Check soot mass in the oil and if too high carry out an oil service, or;

18. Oil dilution factor 0 Zero good, 10 bad if too high carry out an oil service.

Peugeot Citroen Vehicleswiper Blades Inoperable

Make/Model: Peugeot Citroen vehicles

Fault: Wiper blades inoperable

Prolonged periods of inoperability, or flat batteries can cause the wiper blades on Peugeot Citroen vehicles to become inoperable. Our IVS 360 Master Technicians expect that beyond the pandemic, you will see many issues such as these in your workshop. For Peugeot Citroen vehicles, to restore wipers to a functioning status, our experts advise that you:

1. Remove steering column trims allowing access to steering wheel module connections.

2. Switch ignition off and wait 2 minutes.

3. Turn ignition on.

4. Disconnect grey 6 pin plug from the steering wheel module (comm. 2000).

5. Wait 3 to 5 seconds and the lights and wipers should come on and, in some cases an audible noise may be heard.

6. Switch ignition off and wait for 3 - 5 minutes.

7. Reconnect the 6 pin grey plug.

8. Switch ignition on.

9. Switch ignition off.

10. Put wiper stalk in auto or intermittent position.

11. Put wiper stalk back to the off position, switch ignition on and test the wipers.

WHAT TOP FIVE INCORRECT BRAKE-RELATED FITTING TIPS (OR FACTS) WOULD YOU LIKE TO DEBUNK?

1. DIRECTIONAL PADS

These have been available for a number of years now and unfortunately, we still see a few being fitted incorrectly. We supply information on how these parts should be fitted correctly either through the installation instructions in the box or through the training we offer and any technical videos we produce.

2. BRAKE PAD SHIMS

IT INFORMATION FOR GARAGES –ROBERT BECKMAN, BLUELINK

Our internet connectivity is becoming more and more important every day. Everyone has seen the spinning hourglass or the Netflix circle when a piece of software is trying to phone home. This is what we see, but there is more going on behind the scenes. Without going into extreme technical details think about the internet being like a water pipe going in AND out of your workshop. If you split this incoming pipe to many places waterflow slows. Same goes for the out, pipes back up or stuff can spill. The internet, and especially how your internet is setup in your workshop matters.

Modern vehicles like Tesla can connect directly to your workshops WiFi, or in some cases via a hard-wired connection. It uses this connection to “phone home” and allows for diagnosis and software updates. Tesla is somewhat ahead of the game, but it gives us a good idea of what is coming. Many manufacturers are moving in this direction.

Today’s diagnostic tools leverage internet connectivity in different ways. Some use the connection to keep the tool up to date or allow you to print or browse the internet. Other tools such as those offered by Opus IVS use this internet connection to facilitate remote connectivity to vehicles. Remote connectivity works extremely well if certain internet conditions are met. Think about water pipes. If you are connected to a car and attempting to “program” something and someone else on your network is using much of the water it can either slow down your whole process, or worse cause a programming failure. If another employee is uploading large amounts of data like photos or videos, the pipes back up. So, the size of the pipes matter to each location in your workshop.

Like directional brake pads, shims have been fitted or supplied with the brake pads as a way to reduce noise in the brake system.

We still see a high volume of brake pads not being installed with shims that are supplied in the box.

3. WRONG GREASE USED FOR FITTING THE BRAKE COMPONENT

Over the years I have been in the industry – which is somewhat nearly 30 years – copper grease was the primary grease used.

Over time the brake systems have advanced to meet the need of the modern vehicles we have on today’s roads. So, using copper grease is old hat now and a more modern grease should be used for such purposes.

4. DIRTY HUB

We know that technicians are under a lot of pressure to get the vehicle in and out as quickly as possible. But this comes with consequences when fitting the brake parts correctly.

Time should be spent wisely on ensuring that all the components in the brake system are cleaned and checked correctly. This is important especially when fitting brake discs to the vehicle. If the hub is not properly cleaned or checked for lateral run-out issues will occur after a period of time.

The driver will now have juddering brakes under heavy or light braking applications. This will require the brakes to be fully stripped down and replaced, which will not only cost the garage downtime but also have a detrimental effect on the confidence of the customer.

5. WRONG TOOLS

It’s paramount that the correct tools be used during the replacement of the brake products.

Let’s just focus on one for the time being. Some manufacturers have used ceramic pistons on the brake callipers. Most garages are still using water pump pliers to push the brake callipers piston back. Due to the fact that some of these pistons are made of ceramic, damage can be caused using the wrong tools.

by Debbie McKay Commercial Director, MotoNovo Finance